COVER 4773222 - Caterpillar

Disassembly Procedure
Start By:
Remove the fuel transfer pump. Refer to Disassembly and Assembly, "Fuel Transfer Pump - Remove".
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Illustration 1 g00544796
Place an identification mark on each half of the fuel transfer pump for the assembly procedure.
Remove the screw that holds cover (1) .
Remove cover (1) and the gasket.
Remove gauze (2) .
Remove the screws that hold the two halves of the fuel transfer pump together.
Rotate diaphragm assembly (5) at 90 degrees in order to remove the pull rod from link arm (8) .
Remove diaphragm assembly (5) .
Remove stem seal (6), spring seat washer (7), and diaphragm spring (12) from the pull rod.Note: Diaphragm assembly (5) and the pull rod are not serviced parts.
Use a suitable lever in order to remove valves (4) and seat washers (3). The valves are peened in.Note: Some of the metal that is peened may need to be removed in order to remove valves (4) .
Hold rocker lever (11) in a vise and hit the body of the fuel transfer pump with a soft hammer in order to release retainers (10). This will allow you to remove link arm (8) .
Do not damage the face on the body of the fuel transfer pump.
Remove the following items: rocker lever (11), pin (9), link arm (8) and the return spring.